DE2251631A1 - Exhaust gases purifier - with conductive catalyst carrier heated by car battery - Google Patents

Exhaust gases purifier - with conductive catalyst carrier heated by car battery

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Publication number
DE2251631A1
DE2251631A1 DE2251631A DE2251631A DE2251631A1 DE 2251631 A1 DE2251631 A1 DE 2251631A1 DE 2251631 A DE2251631 A DE 2251631A DE 2251631 A DE2251631 A DE 2251631A DE 2251631 A1 DE2251631 A1 DE 2251631A1
Authority
DE
Germany
Prior art keywords
exhaust gas
catalyst
heated
carrier
exhaust gases
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
DE2251631A
Other languages
German (de)
Inventor
Kenji Mizuno
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daido Steel Co Ltd
Original Assignee
Daido Steel Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daido Steel Co Ltd filed Critical Daido Steel Co Ltd
Publication of DE2251631A1 publication Critical patent/DE2251631A1/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
    • F01N3/2026—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means directly electrifying the catalyst substrate, i.e. heating the electrically conductive catalyst substrate by joule effect
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Catalysts (AREA)

Abstract

A catalytic exhaust gas purifier for I.C. engines includes an electrically conductive carrier for the catalyst which is heated by the car battery to 100-200 degrees C. When a sensor confirms that the leaving gases are hot enough, a thermostat-operated contactor cuts out the battery, and the catalytic reaction maintains the temperature.

Description

Verfahren und Vorrichtung zur Reinigung von Abgas Die Erfindung betrifft ein Verfahren zur katalytischen Reinigung der von einem Kraftfahrzeug erzeugten Abgase oder der von anderen Brennkraftmaschinen erzeugten Abgase sowie eine Vorrichtung zur Iurchfuhrung dieses Verfahrens. Method and device for cleaning exhaust gas The invention relates to a method for the catalytic cleaning of those generated by a motor vehicle Exhaust gases or the exhaust gases generated by other internal combustion engines and a device to carry out this procedure.

Bei den bekannten Verfahren und Vorrichtungen9 bei denen z.Be ein Oxidationskatalysator in einer Abgas-Re inigungsvorri ohtung für Kraftfahrzeuge angeordnet und keine Wärmequelle unmittelbar vor dem Katalysator vorgesehen ist, um letzteren zu erhitzen, kann das von der BrennkraStmaschine abgegebene Abgas bei Kontaktierung mit dem Katalysator nicht gereinigt werden, sofern es nicht eine Temperatur von etwa 20000 an nimmt. Genauer gesagt, beginnt das Abgas mit dem Katalysator zu reagieren, wenn es die genannte Temperatur nach einer für das Warmlaufen der Brennkraftmaschine erforderlichen Zeitspanne im Bereich von einigen Minuten bis zu einigen zwanzig Ninuten erreicht. Infolgedessen wird der Katalysator in erheblichem Maß durch das Abgas verschmutst, bevor seine Temperatur ausreichend weit angestiegen ist, was nicht nur eine sehr kurze Betriebslebensdauer des Katalysators, sondern unweigerlich auch die Emission einer größeren Menge ungereinigten Abgases zum Zeitpunkt des Anlassens der Brennkraftmaschine zur Folge hat.In the known methods and devices 9 in which, for example, a Oxidation catalyst in an exhaust gas cleaning device for motor vehicles arranged and no heat source is provided directly in front of the catalytic converter, in order to heat the latter, the exhaust gas emitted by the internal combustion engine can contribute Contacting the catalyst cannot be cleaned unless there is a temperature from about 20,000. More precisely, the exhaust gas starts with the catalytic converter react when it reaches the said temperature for a warm-up of the internal combustion engine required period of time ranging from a few minutes to a few twenty Minutes away. As a result, the catalyst is to a significant extent by the Exhaust polluted before its temperature has risen sufficiently is what not only has a very short operating life of the catalyst, but inevitably also the emission of a larger amount of uncleaned exhaust gas at the time the starting of the internal combustion engine.

Auf Grund der Erfindung ist daher in erster Linie die Verbesserung des bekannten Verfahrens zur Reinigung von Abgas. Diese Aufgabe wird erfindungsgemäß mittels einer Abgas-Reinigungsvorrichtung gelöst, die einen elektrisch .leitfähigen Träger und einen an diesem haftenden Katalysator> z.B. Oxidationskatalysator aufweist, wobei der Katalysator durch an den Tiäger angelegten elektrischen Strom beheizt und das Abgas über den so beheizten Katalysator geleitet wird, so daß die katalytische Reaktion einsetzen kann, sobald das Abgas mit dem Katalysator in Kontakt kommt.Therefore, the primary aim of the invention is to improve the known method for cleaning exhaust gas. This object is achieved according to the invention solved by means of an exhaust gas purification device, which has an electrically conductive Carrier and a catalyst adhering to it> e.g. oxidation catalyst having the catalyst by electrical current applied to the Tiäger heated and the exhaust gas is passed over the thus heated catalyst, so that the catalytic reaction can start as soon as the exhaust gas comes into contact with the catalyst comes.

Im folgenden ist eine bevorzugte Ausführungsform der Erfindung an Hand der bedliegenden Zeichnung näher erläutert.The following is a preferred embodiment of the invention Hand of the overlying drawing explained in more detail.

Es zeigen: Fig. 1 einen Teilschnitt durch eine Abgas-Reinigungsvorrichtung nach der Erfindung und Fig. 2 ein Fließschema des erfindungsgemäßen Abgas-Reinigungsverfahrens, wenn die Vorrichtung gemäß Fig. 1 in ein Kraftfahrzeug eingebaut ist.1 shows a partial section through an exhaust gas cleaning device according to the invention and FIG. 2 is a flow diagram of the exhaust gas cleaning process according to the invention, when the device according to FIG. 1 is installed in a motor vehicle.

Gemäß Fig. 1 weist die erfindungsgemäße Abgas-Reinigungsvorrichtung 3 einen elektrisch leitfähigen Träger W, an dessen Oberfläche der Katalysator haftet, zwischen den Träger und ein Gehäuse X eingefügtes Isoliermaterial Y, eine an der Seitenwand vorgesehene und mit dem Träger W verbundene Klemme Z und an den beiden Enden einen Einlaß 7 bzw. einen Auslaß 8 für das Abgas auf.According to FIG. 1, the exhaust gas cleaning device according to the invention 3 an electrically conductive carrier W, to the surface of which the catalyst adheres, between Carrier and a housing X inserted insulating material Y, a terminal Z and provided on the side wall and connected to the bracket W at the two ends an inlet 7 and an outlet 8 for the exhaust gas.

Im folgenden ist das Verfahren zur Abgasreinigung- bei Einbau der vorstehend beschriebenen Abgas-Reinigungsvorrichtung 3 in ein Kraftfahrzeug an Hand von Fig. 2 näher erläutert. Dabei wird zunächst 1 - 2 min vor dem Anlassen der Brennkraftmaschine des Kraftfahrzeugs ein elektrischer Strom von etwa 40 A vom Akkumulator 4 an den in der Vorrichtung 3 enthaltenen Katalysator-Träger W angelegt, um ihn aufzuheizen. Beim Anlassen der Brennkraftmaschine 1 wird, nachdem die Temperatur des Trägers W auf etwa 100 -2000C angestiegen ist, das von der Brennkraftmaschine 1 abgegebene Abgas A mit der an einem Sekundärluft-Injektor 2 von außen angesaugten Luft B vermischt und in Form eines Mischgases a, das aus dem Abgas der Maschine und der Luft besteht, über den Einlaß 7 in-die Reinigungsvorrichtung 3 eingeleitet. Innerhalb der Vorrichtung 3 kommt das Mischgas C mit dem in der Vorrichtung 3 enthaltenen, vorher aufgeheizten Katalysator in Berührung, wobei es augenblicklich mit dem Katalysator reagiert, so daß vollständig gereinigtes Gas D an die Außenluft abgegeben wird.The following is the procedure for exhaust gas cleaning when installing the Above-described exhaust gas purification device 3 in a motor vehicle on hand of Fig. 2 explained in more detail. This is done 1 to 2 minutes before the engine is started the motor vehicle an electric current of about 40 A from the accumulator 4 to the in the device 3 contained catalyst carrier W applied to heat it. When starting the internal combustion engine 1, after the temperature of the carrier W has risen to about 100 -2000C, the output from the internal combustion engine 1 Exhaust gas A is mixed with the air B drawn in from the outside at a secondary air injector 2 and in the form of a mixed gas a, which consists of the exhaust gas from the engine and the air, Introduced into the cleaning device 3 via the inlet 7. Inside the device 3 comes the mixed gas C with the previously heated gas contained in the device 3 Catalyst in contact, whereby it reacts instantly with the catalyst, so that completely purified gas D is released into the outside air.

Sobald die Temperatur des gereinigten Gases D einen festen Wert erreicht, kann die gatalysatrtemperatur dann durch die Reaktionswärme des Katalysators selbst in ausreichendem Maß aufrechterhalten werden, so daß dann die Stromzufuhr vom Akkumulator 4 mittels eines in Abhängigkeit von einem Thermostaten 5 arbeitenden Magnetschalters 6 automatisch abgeschaltet werden kann.As soon as the temperature of the cleaned gas D reaches a fixed value, The catalyst temperature can then be adjusted by the heat of reaction of the catalyst itself sufficient to be maintained so that the power supply from the accumulator 4 by means of a magnetic switch operating in dependence on a thermostat 5 6 can be switched off automatically.

Obgleich die vorstehend beschriebene Abgas-Reinigungsvorrichtung so ausgebildet ist, daß das ganze Katalysatorbett aufgeheizt wird, kann sie bei Bedarf auch so ausgelegt sein, daß nur ein Teil des Katalysatorbetts erhitzt wird.Although the exhaust gas purification device described above is so is designed that the entire catalyst bed is heated, it can if necessary also be designed so that only part of the catalyst bed is heated.

Der für die Reinigung des Abgases benutzte Katalysator kann in Abhängigkeit' von der Art des zu reinigenden Abgases entsprechend gewählt werden. Für die erfindungsgemäße Vorrichtung wird das Katalysatorbett beispielsweise in der Weise hergestellt, daß ein elektrisch leitfähiger Träger, z.B.The catalytic converter used to clean the exhaust gas can vary depending on ' be selected accordingly on the type of exhaust gas to be cleaned. For the invention Device, the catalyst bed is produced, for example, in such a way that an electrically conductive support, e.g.

aus rostfreier Stahldrahtgaze bzw. -sieb, Netallfaser und dgl., unmittelbar mit einem Oxidationskatalysator beschichtet wird. Ebenso kann ein Katalysatorbett verwendet werden, das durch schichtweise Anordnung eines wärmebeständigen, gasdurchlässigen, faserförmigen Trägers, beispielsweise aus Steinwolle, der mit einem Oxidationskatalysator beschichtet ist, in vergleichsweise hoher Konzentration zwischen den genannten, leitfähigen Trägerelementen angeordnet wird. Bei der Erfindung ist der anwendbare Eatal.ysator nicht auf Oxidationskatalysatoren beschränkt, vielmehr kann das erfindungsgemäße Verfahren wirksam mit Jedem beliebigen Katalysator durchgeführt werden, der eine vergleichsweise hohe Reaktions-Anfangatemperatur besitzt.made of stainless steel wire gauze or sieve, netall fiber and the like., directly is coated with an oxidation catalyst. A catalyst bed can also be used are used, which by layering a heat-resistant, gas-permeable, fibrous carrier, for example made of rock wool, with an oxidation catalyst is coated, in a comparatively high concentration between the named, conductive support elements is arranged. In the invention is the applicable Eatal.ysator is not limited to oxidation catalysts, rather the inventive Processes can be effectively carried out with any catalyst which has a has a comparatively high reaction start temperature.

Obgleich die Erfindung vorstehend in Verbindung mit der Reinigung von Abgasen von Kraftfahrzeugen beschrieben ist, kann das erfindungsgemäße Verfahren ersichtlicherweise nicht nur wirksam für die Reinigung von Abgasen von beliebigen Brennkraftmaschinenl aondern auch für die Reinigung von brennbaren, giftigen Abgasen eingesetzt werden, die beim Lackieren, beim Backen, bei Iackierungstrookenöfen und dgl. entstehen.Although the invention above in connection with cleaning of exhaust gases from motor vehicles is described, the method according to the invention evidently not only effective for the purification of exhaust gases from any Internal combustion engines are also used for cleaning flammable, poisonous exhaust gases are used in painting, baking, Iackierungstrookenöfen and like. arise.

Erfindungsgemäß ist das Abgas auf eine Kontaktierung mit einem erhitzten Katalysator beschränkt, so daß die Verschmutsung des Katalysators durch das Abgas verringert wird, was zu einer beträchtlichen Verlängerung der Betriebslebensdauer des Katalysators führt. Außerdem hat der Katalysator-Träger beim Anlassen der Brennkraftmaschine bereits eine für den Ablauf der der Abgas-Anfangsreaktion ausreichende Temperatur erreicht, so daß das Abgas sofort mit dem Katalysator reagiert und die Emission von ungereinigtem Abgas beim Anlassen der Brenskraftmaschine vollständig verhindertswird.According to the invention, the exhaust gas is on contact with a heated one Catalytic converter limited, so that the pollution of the catalytic converter by the exhaust gas is reduced, resulting in a significant increase in service life the catalyst leads. In addition, the catalyst carrier has when the internal combustion engine is started a temperature sufficient for the initial exhaust gas reaction to take place reached so that the exhaust gas immediately reacts with the catalyst and the emission of unpurified exhaust gas when starting the internal combustion engine is completely prevented.

Zusammenfassend schafft die Erfindung mithin ein Verfahren zum Reinigen eines Abgases mittels einer Abgas-Reinigungsvorrichtung, die mit einem elektrisch leitfähigen Träger mit einem daran haftenden Katalysator versehen ist, wobei der Oxidationskatalysator durch an den Träger angelegten elektrischen Strom aufgeheizt und das Abgas' über den auf diese Weise erhitzten Oxidationskatalysator geleitet wird.In summary, the invention therefore creates a method for cleaning an exhaust gas by means of an exhaust gas purification device, which with an electrically conductive support is provided with a catalyst adhering thereto, the Oxidation catalyst heated by electric current applied to the carrier and the exhaust gas' passed over the oxidation catalyst heated in this way will.

Claims (4)

P a t e n t a n 8 p r U c~h eP a t e n t a n 8 p r U c ~ h e 1. Verfahren zur katalytisohen Reinigung von Abgas mittels einer Abgas-Relnigungsvorrlchtung, dadurch gekennzeichnet, daß ein an einem Träger aus einem elektrisch leitfähigen Material haftender Katalysator vorgesehen wird und daß das Abgas durch die Vorrichtung geleitet wird, nachdem der Katalysator durch Anlegung von elektrischem Strom an den Träger erhitzt worden ist.1. Process for the catalytic cleaning of exhaust gas by means of an exhaust gas cleaning device, characterized in that one on a carrier made of an electrically conductive Material adhering catalyst is provided and that the exhaust gas through the device is passed after the catalyst by applying electric current the carrier has been heated. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als das zu reinigende Abgas das von einer Brennkraftmaschine abgegebene Gas benutzt wird.2. The method according to claim 1, characterized in that as that Exhaust gas to be cleaned is the gas emitted by an internal combustion engine. 3. Ahgas-Reinigungsvorrichtung zur Durchführung des Verfahrens nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß sie einen elektrisch leitfähigen Träger (W) und einen an diesem haftenden Katalysator aufweist, wobei der Katalysator durch Anlegung von elektrischem Strom an den Träger (W) erhitzt wird.3. Ahgas cleaning device for carrying out the method according to Claim 1 or 2, characterized in that it is an electrically conductive A carrier (W) and a catalyst adhering thereto, the catalyst is heated by applying an electric current to the carrier (W). 4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß eine Einrichtung zum Aufheizen eines Teils des Katalysatorbetts vorgesehen ist.4. Apparatus according to claim 3, characterized in that a device is provided for heating part of the catalyst bed. LeerseiteBlank page
DE2251631A 1971-10-20 1972-10-20 Exhaust gases purifier - with conductive catalyst carrier heated by car battery Pending DE2251631A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46082506A JPS4847479A (en) 1971-10-20 1971-10-20

Publications (1)

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DE2251631A1 true DE2251631A1 (en) 1973-05-10

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DE (1) DE2251631A1 (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0035053B1 (en) * 1979-12-20 1984-02-01 Degussa Aktiengesellschaft Catalytic filter for the purification of diesel exhaust gas
US4456457A (en) * 1981-04-28 1984-06-26 Nippon Soken, Inc. Exhaust gas cleaning device for diesel engine
DE3723544A1 (en) * 1987-07-16 1989-01-26 Man Technologie Gmbh ELECTROSTATIC FILTER FOR CLEANING GASES
WO1989010471A1 (en) * 1988-04-25 1989-11-02 Emitec Gesellschaft Für Emissionstechnologie Mbh Electrically conductive honeycomb body, process for monitoring it and its use as a support for an exhaust gas catalyst
EP0456919A2 (en) * 1990-04-16 1991-11-21 W.R. Grace & Co.-Conn. Catalytic converter system
DE4017360A1 (en) * 1990-05-30 1991-12-05 Fev Motorentech Gmbh & Co Kg IC engine exhaust catalytic conversion during cold starting - involves preheating of active material by direct current supplied to coating on supporting wall of converter
DE4100133A1 (en) * 1991-01-04 1992-07-09 Emitec Emissionstechnologie METHOD AND DEVICE FOR ELECTRICALLY PREHEATING A COMPONENT OF A MOTOR VEHICLE, IN PARTICULAR A CATALYST SYSTEM
DE4223854A1 (en) * 1991-07-18 1993-01-28 Mitsubishi Electric Corp Power supply for motor vehicle parts - includes switch connected between power source and heating unit e.g. for intake of air
EP0556129A1 (en) * 1992-02-14 1993-08-18 Institut Francais Du Petrole Exhaust duct with a catalytic wall, for internal combustion engines
US5340020A (en) * 1989-06-20 1994-08-23 Emitec Gesellschaft Fuer Emissiontechnologie Mbh Method and apparatus for generating heat by flameless combustion of a fuel in a gas flow
US5393586A (en) * 1992-10-27 1995-02-28 Corning Incorporated Localized electrical heating of honeycomb structures
EP0717178A3 (en) * 1990-07-04 1996-07-17 Ngk Insulators Ltd
US5626785A (en) * 1993-07-16 1997-05-06 Corning Incorporated Electrode assembly and method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5347635Y2 (en) * 1972-11-20 1978-11-15
JPS50128324U (en) * 1974-04-08 1975-10-21

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0035053B1 (en) * 1979-12-20 1984-02-01 Degussa Aktiengesellschaft Catalytic filter for the purification of diesel exhaust gas
US4456457A (en) * 1981-04-28 1984-06-26 Nippon Soken, Inc. Exhaust gas cleaning device for diesel engine
DE3723544A1 (en) * 1987-07-16 1989-01-26 Man Technologie Gmbh ELECTROSTATIC FILTER FOR CLEANING GASES
US5146743A (en) * 1988-04-25 1992-09-15 Emitec Gesellschaft Fur Emissionstechnologie Mbh Process for accelerating the response of an exhaust gas catalyst, and apparatus and electrically heatable carrier bodies for performing the method
WO1989010471A1 (en) * 1988-04-25 1989-11-02 Emitec Gesellschaft Für Emissionstechnologie Mbh Electrically conductive honeycomb body, process for monitoring it and its use as a support for an exhaust gas catalyst
WO1989010470A1 (en) * 1988-04-25 1989-11-02 Emitec Gesellschaft Für Emissionstechnologie Mbh Process for accelerating the response of an exhaust gas catalyst, arrangements and electrically heated supports for inplementing the process
US5480621A (en) * 1988-04-25 1996-01-02 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Electrically conductive honeycomb as an exhaust gas catalyst carrier body
US5340020A (en) * 1989-06-20 1994-08-23 Emitec Gesellschaft Fuer Emissiontechnologie Mbh Method and apparatus for generating heat by flameless combustion of a fuel in a gas flow
EP0456919A2 (en) * 1990-04-16 1991-11-21 W.R. Grace & Co.-Conn. Catalytic converter system
EP0456919A3 (en) * 1990-04-16 1992-01-22 W.R. Grace & Co.-Conn. Catalytic converter system
DE4017360A1 (en) * 1990-05-30 1991-12-05 Fev Motorentech Gmbh & Co Kg IC engine exhaust catalytic conversion during cold starting - involves preheating of active material by direct current supplied to coating on supporting wall of converter
EP0717178A3 (en) * 1990-07-04 1996-07-17 Ngk Insulators Ltd
DE4100133A1 (en) * 1991-01-04 1992-07-09 Emitec Emissionstechnologie METHOD AND DEVICE FOR ELECTRICALLY PREHEATING A COMPONENT OF A MOTOR VEHICLE, IN PARTICULAR A CATALYST SYSTEM
WO1992012334A1 (en) * 1991-01-04 1992-07-23 Emitec Gesellschaft Für Emissionstechnologie Mbh Process and device for electrically preheating a component of a motor vehicle, especially a catalytic converter system
US5433072A (en) * 1991-01-04 1995-07-18 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Assembly for regulating and/or monitoring the electric heating of a catalytic converter system
DE4223854A1 (en) * 1991-07-18 1993-01-28 Mitsubishi Electric Corp Power supply for motor vehicle parts - includes switch connected between power source and heating unit e.g. for intake of air
DE4223854C3 (en) * 1991-07-18 2003-04-03 Mitsubishi Electric Corp Device for the energy supply of motor vehicle parts
DE4223854C2 (en) * 1991-07-18 1999-03-25 Mitsubishi Electric Corp Device for the energy supply of motor vehicle parts
EP0556129A1 (en) * 1992-02-14 1993-08-18 Institut Francais Du Petrole Exhaust duct with a catalytic wall, for internal combustion engines
FR2687431A1 (en) * 1992-02-14 1993-08-20 Inst Francais Du Petrole EXHAUST TUBE WITH CATALYTIC WALL FOR INTERNAL COMBUSTION ENGINES.
US5393586A (en) * 1992-10-27 1995-02-28 Corning Incorporated Localized electrical heating of honeycomb structures
US5626785A (en) * 1993-07-16 1997-05-06 Corning Incorporated Electrode assembly and method

Also Published As

Publication number Publication date
JPS4847479A (en) 1973-07-05

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